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"90% of the mean annual
precipitation falls during the summer months from October
to March (Weddepohl et al 1991). Subsequently, the highest flows are
recorded during these rainfall months, while the lowest
levels are recorded in late spring before the
onset of the summer rains (Weddepohl et al 1991). Flow types of
the in-stream channel of the study area include; rippled surface,
undular standing waves and broken standing waves,
which are common. The general physical biotopes of
the river can then be classified as; glides, chutes, runs, riffles,
rapids and cascades (Roux 1999)." (http://etd.rau.ac.za/theses/available/etd-06282005-104631/)
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